Method of waterproofing and rendering impervious to dust, bags, sacks, and the like.



subject of Georgethe Fifth, King of Great Britain and Its Dependencies,residing at STATES PATENT oFFIon .mnnz ennsmnv, or MELBGURNE, vrc'ronmausrmm.

mnrnon or warnnrnoormem nnnnnnrne rivrrnnvioos -'.ro nosr, Bees, sacks,

" AND THELIKE.

Ho Drawing.

To all whom it ma concern:

Be it known t at I, JABEZ GADsnnN, a

572 Lonsdale street, Melbourne, Victoria, Australiayhave inventedcertain new and useful Improvements in Methods of VVater-..

proofing-and Rendering Impervious to Dust,

' Bags, Sacks, and the like, of which the following is.a specification;

In bagging and sacking of finely powdered .or granulated articles it hasbeen found to be a serious defect that the article placed within the bagor sack percolates through the fabric of which the bag 'or sack is madewhile the same is being handled or in transit with the result that thefinely di- .vided dust is raised and permeates the atmosphere making itvery injurious to the health of the persons compelled to work therein.It is found advantageous if the bag or sack can be made more or lesswater proof, In the following description I shall describe the baggedarticle as cement or superphosphates although it is to be distmctlyunderstood that the article ma be any finely divided or pulverizedmateria which is bagged or sacked for market;

Various methods have been tried in the trade of'bag and sack making toremedy this serious evil with more or less success.

For example, one method is to apply 'a' composition to the fabric beforemaking it into the bag or sacks. Another method is to attach totheinsideof the ba or sack, by c any suitable means, paper or ot ermaterial through which the dust will notsift. In

both these methods as will be observed the cloth has to be treated anddried in the piece before being made upfililnto bags or sacks. Thisrenders the ma g up, of the material into bags or sacks more, difiicultv and retards it considerably. It is also foimd that bags and sackstreated by these methodshave to be made lar er in size to contain the-same quantity as a ag which is made from fabric that has not beentreated because they are dry and unpliable, also when being filled withmaterial the composition or lfilaiper lining cracks and breaks away thus11 fying to .a great degree the purpose for which thelyhwefetreate e.foregoing is described in order to Specification of Letters Patent.

' specify the present state of the art ofwaterroofing and renderingimpervious to dust,

ags andsacks; 'To overcome these objections I have successfully achievedthe ob j ect of the title given this invention.

In carrying 'my invention into practical effect the bags orsacks aremanufactured from the usual fabric. The packer, say the cement orsuperphosphates merchant, before packing or sacking the article spraysor coats by any suitable means the inside of the ready made-up ba'g withany suitable adhesix e fluid-or composition.

While the inside of the bag or sack is in a wet conditioh'the article tobe bagged: is placed into the bags orsacks. Thecement or superphosphateswhich first'comes into con tact with'the adhesive fluid spread on theinside of the bag attaches itself. thereto and" Patented Mar. 5, 1918ApplicationfiledlulyG,1917. Serial Ito 179,051.

trance of foreign matter into the bag or I sack and at the same timeprevents the exit of finely pulverized dust of the bagged artiole intothe surrounding atmosphere.

-When it is required to make the bag or sack proof against thedeteriorating effect of ,acidulated powders, the ravages ofJ-insec'ts Ior damp proof, any chemical whichv will produce the desired result isadded to the adhesive fluid. a

I claim:' a

ging or sacking dusty materials so as to render the bags or sacks dustor waterproof, consisting in. spraying the; interiorof. the

'An improved'method or process of bag- I bags or sackswith any suitableadhesive fluid just before filling them with the dusty" materials sothat the fluid and dust coming into contact become incorporated or combined and form a coating which fills up the interstices of the fabricsubstantiallyeas herein described. v

Inwitness whereof I have signed this specification in the presence oftwo'- w-itnesses. Dated this. 2'8'day of May, 1917 Y J. GADSDEN. I

- Witnesses: i

G. A. CALL,

C. W. GADSDEN.

